Autor segons l'article: Rajendran AA; Guo K; Alvarez-Fernandez A; Gengenbach TR; Velasco MB; Fornerod MJ; Shafique K; Füredi M; Formentín P; Haji-Hashemi H; Guldin S; Voelcker NH; Cetó X; Prieto-Simón B
Departament: Enginyeria Electrònica, Elèctrica i Automàtica
Autor/s de la URV: Ambily Rajendran, Anandapadmanabhan / Formentín Vallés, Pilar / Haji Hashemi Varnosfaderani, Hedieh / Prieto Simón, Beatriz / Shafique, Kandeel
Paraules clau: Porous silicon Polyfurfuryl alcohol Electrochemical transducer Dna sensor Carbon-stabilization
Resum: Carbon-based nanomaterials are key to developing high-performing electrochemical sensors with improved sensitivity and selectivity. Nonetheless, limitations in their fabrication and integration into devices often constrain their practical applications. Moreover, carbon nanomaterials-based electrochemical devices still face problems such as large background currents, poor stability, and slow kinetics. To advance towards a new class of carbon nanostructured electrochemical transducers, we propose the in-situ polymerization and carbonization of furfuryl alcohol (FA) on porous silicon (pSi) to produce a tailored and highly stable transducer. The thin layer of polyfurfuryl alcohol (PFA) that conformally coats the pSi scaffold transforms into nanoporous carbon when subjected to pyrolysis above 600 °C. The morphological and chemical properties of PFA-pSi were characterized by scanning electron microscopy, and Raman and X-ray photoelectron spectroscopies. Their stability and electrochemical performance were investigated by cyclic voltammetry and electrochemical impedance spectroscopy in [Fe(CN)6]3-/4-, [Ru(NH3)6]2+/3+, and hydroquinone. PFA-pSi showed superior electrochemical performance compared to screen-printed carbon electrodes while also surpassing glassy carbon electrodes in specific aspects. Besides, PFA-pSi has the additional advantage of easy tuning of the electroactive surface area. To prove its potential for biosensing purposes, a DNA sensor based on quantifying the partial pore blockage of the pSi upon target hybridization was built on PFA-pSi. The sensor showed a limit of detection of 1.4 pM, outperforming other sensors based on the same sensing mechanism.
Àrees temàtiques: Mechanical engineering Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) General materials science
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: kandeel.shafique@urv.cat beatriz.prieto-simon@urv.cat hedieh.hajihashemi@urv.cat hedieh.hajihashemi@urv.cat pilar.formentin@urv.cat pilar.formentin@urv.cat anandapadmanabhan.ambily@estudiants.urv.cat anandapadmanabhan.ambily@estudiants.urv.cat kandeel.shafique@urv.cat
Identificador de l'autor: 0000-0001-8016-1565 0000-0002-1619-6912 0000-0002-1619-6912
Data d'alta del registre: 2024-02-17
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/pii/S2590049824000018?via%3Dihub
Referència a l'article segons font original: Materials Today Advances. 21
Referència de l'ítem segons les normes APA: Rajendran AA; Guo K; Alvarez-Fernandez A; Gengenbach TR; Velasco MB; Fornerod MJ; Shafique K; Füredi M; Formentín P; Haji-Hashemi H; Guldin S; Voelcke (2024). A new class of porous silicon electrochemical transducers built from pyrolyzed polyfurfuryl alcohol. Materials Today Advances, 21(), -. DOI: 10.1016/j.mtadv.2024.100464
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI de l'article: 10.1016/j.mtadv.2024.100464
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2024
Tipus de publicació: Journal Publications